Quadratic Diffusers

@tomic601
I trust that an adequate amount of research into good tasting wines was invested in your dual truncated conic wedge diffusers of choice?
Such research done with music, seems like a worthy quest for an enjoyable evening or two..three.. loads of them by the looks of it :-)

but congrats Rix - you already know more than you know…..

Right now, mine do look remarkably like a science project - they do sound great though. And my wife is still ok with it, anyone might think she's becoming an audiophile?!!

Apparently it's what I don't know, that I don't know, that is the greatest potential for improvement.

@boxer12 -  Are you going to try more diffusion between the speakers? Please circle back and share your findings as you move forward. These diffusers took me quite some time, Saturdays mostly, every now and then.

Rix,
Absolutely at some point I will experiment with more diffusion behind the speakers. I like this "effect" better than absorption. 

As far as moving forward... I've been experimenting with diffusion in the room corners lately. That being... Taking 8' long 3" I.D. cardboard tubes (I get bar stock shipped in these types of tubes) and drilling approx. 125, 5/8" holes in them (somewhat equally spaced all the way around/top to bottom), then covering them with with plastic mesh material & capping top & bottom. This has also helped with overall system clarity, although to a lesser degree than the wall-type diffusion panels.  

@boxer12 - an interesting idea, one I'd never come across.
It kind of sounds similar to a Binary Amplitude Diffusor BAD?

Has anyone reading this come across a folded well diffuser? Tried them?

absorption and diffusion are two faces of one entity called 'acoustic optimisation'.

their mutual balance totally determines correct presentation of highly valued musical criteria for reproduction quality:
spatiousness, presence, focus, ambiance, directness, convincing power, non-coloration and dynamic contrast
- Source ReadScaped DIY QRD Diffusers

Rix,
Thanks for the quote above. Makes good sense.

IRT BAD, it looks like they are using absorption in those. The ones I've made are hollow & capped top & bottom. I did try these with wool balls inside them & liked it better (in my room) without.